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Asked: April 23, 20202020-04-23T00:24:49+05:30 2020-04-23T00:24:49+05:30In: Physical Metallurgy & Heat treatment

BARC-15: What is the maximum number of phases that can co-exist in a Binary Phase Diagram?

BARC-15: What is the maximum number of phases that can co-exist in a Binary Phase Diagram?
BARCbinary phase diagramequilibriumphase diagramphase rule
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    1. SAI CHARAN Silver Metallurgical Engineering student
      2020-04-23T11:03:39+05:30Added an answer on April 23, 2020 at 11:03 am

      It is based of the phase diagram we have taken if the phase diagram is drawn at atmospheric pressure then DOF= C-P+1 Then answer is 3 If we consider the diagram is not drawn at atmospheric pressure then DOF=C-P+2 Then answer is 4   Basically we take pressure constant for most of the cases for oRead more

      It is based of the phase diagram we have taken if the phase diagram is drawn at atmospheric pressure then

      DOF= C-P+1

      Then answer is 3

      If we consider the diagram is not drawn at atmospheric pressure then

      DOF=C-P+2

      Then answer is 4

       

      Basically we take pressure constant for most of the cases for our convenience .

       

       

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    2. [email protected] Platinum
      2020-04-23T11:15:39+05:30Added an answer on April 23, 2020 at 11:15 am

      It is based on the Gibb's phase rule which is used  for the determination of no of phases, compnents and the no of independent variables present in a phase diagram. F=C-P+2 where F=degree of freedom , C= no of components, P= no of phases and 2 is for temp and pressure. Generally binary phase diagramRead more

      It is based on the Gibb’s phase rule which is used  for the determination of no of phases, compnents and the no of independent variables present in a phase diagram.

      F=C-P+2 where F=degree of freedom , C= no of components, P= no of phases and 2 is for temp and pressure. Generally binary phase diagram is considered with one atmospheric pressure. So here pressure is constant. So Gibb’s phase rule for a binary phase diagram is

      F= C-P+1 .In a binary phase diagram components are 2.And to know the max no of phases the degree of freedom should be minimum,which is 0.

      F=C-P+1 hence P=C-F+1.                               P=2-0+1=3 hence max no of phases are 3.

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    3. Raghavendra Nomula Copper Undergrad. in Metallurgical and Materials Engineering from Malaviya National Institute of Technology, Jaipur
      2020-05-11T15:22:35+05:30Added an answer on May 11, 2020 at 3:22 pm

      Three, we can get it from the Gibbs phase rule.  

      Three, we can get it from the Gibbs phase rule.

       

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    4. Kathirvelan R Silver Learner
      2020-04-23T07:50:36+05:30Added an answer on April 23, 2020 at 7:50 am

      Max number of phases that can co exist in binary diagram is three. Max number of phases co exist, when degree of freedom is zero. (F=0). According to Gibb's phase rule F= C-P+1. For binary diagram C=2. If we apply these condition we get P=3.

      Max number of phases that can co exist in binary diagram is three.

      Max number of phases co exist, when degree of freedom is zero. (F=0). According to Gibb’s phase rule F= C-P+1. For binary diagram C=2. If we apply these condition we get P=3.

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    5. Nandhakumar Silver Student
      2020-04-23T08:01:32+05:30Added an answer on April 23, 2020 at 8:01 am

      Gibbs phase rule : DOF = C - P + 2. For maximum phase,  DOF should be zero. (negative is not possible) . So that, maximum number of phases co exist in binary system is four(4). DOF = 0; C = 2;   -)  P = 2 + 2 - 0 = 4.

      Gibbs phase rule : DOF = C – P + 2. For maximum phase,  DOF should be zero. (negative is not possible) . So that, maximum number of phases co exist in binary system is four(4).

      DOF = 0; C = 2;   -)  P = 2 + 2 – 0 = 4.

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    6. vsnikhil3 Copper
      2020-04-23T14:27:15+05:30Added an answer on April 23, 2020 at 2:27 pm

      The maximum no.of phases in a binary phase diagram are 3. By the degrees of freedom: F= C-P+1 F= 2-P+1 F=3-P   ( Therefore, the maximum phases can be 3, if it is more than 3 the DOF is negative but it can never happen)

      The maximum no.of phases in a binary phase diagram are 3.

      By the degrees of freedom:

      F= C-P+1

      F= 2-P+1

      F=3-P   ( Therefore, the maximum phases can be 3, if it is more than 3 the DOF is negative but it can never happen)

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    7. kp_sondagar Iron
      2020-04-29T07:51:15+05:30Added an answer on April 29, 2020 at 7:51 am

      4

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    8. Mohamad Afzal Khan Gold
      2020-05-01T10:24:58+05:30Added an answer on May 1, 2020 at 10:24 am

      Four, liquid two solids, one coagulated intermediate phase, in an eutectic

      Four, liquid two solids, one coagulated intermediate phase, in an eutectic

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